I interacted with a police officer a grand total of 3 times in the last 20 years: one traffic citation, one traffic ticket (missing front plate on the car - deserved), and an officer stopped by after someone broke into our mailbox and asked if I'd press charges (I said I would, but they never found the perp).
Compare that to a bad neighborhood in e.g. Chicago or Detroit where the situation is worse than in Kabul, and without constant, heavy, aggressive police presence a lot more people will be murdered.
The belief that we do not need police and that a "social worker" is sufficient in e.g. Chicago is what someone has astutely called a "luxury belief", a modern equivalent of "let them eat cake". It comes from the tower so ivory, you can't look at it without hurting your eyes in broad daylight.